I am also a fan of Bryan Peterson's book Understanding Exposure. I found it very helpful when I was first starting out.
However, I'm an even bigger fan of an in-person workshop or course when someone is just learning how to use a DSLR (I'm not sure that's the case with your brother but it sounds like it might be). If so, have a look around to see if your local camera store, college or other group offers a hands-on class to teach someone how to use the manual settings on a camera. Remember Forever is an Australian company that offers a 3-hour workshop called "Love Your Camera" that is a good start. We gave my sister--in-law a certificate for an introductory workshop at her local camera store in Toronto last year.
If an in-person course isn't practical, another possiblity is this DVD or online course offered by the Great Courses company. I haven't tried it but it gets mostly good reviews and is quite comprehensive.
Fundamentals of Photography
Another Aussie option for your brother would be a Crumpler camera bag and/or strap. I really like my padded Crumpler Industry Disgrace camera strap and Mr frogoutofwater likes his Medium Haven (a padded bag for your camera that you can put into another bag like a backpack). Crumpler also sells regular camera bags.